05 ccsb f250 6.0 ac/heat front vents not working

[6icko driver]

Hey wondering if anyone has had the problem or knows anything about it.. My heat and ac doesnt come out of front vents on the dash no air will come from the vents at all...The heat works fine coming out of defrosters gets hot and cold no problem works perfect... Ive had the problem for awhile and cant find anything on it... Thanks in advance

[ZMANN]

do you know if your Vacuum system is fine ?

[6icko driver]

well the vents stopped working and after a lil bit of looking around found that the line on the drivers side behind the wheel was disconnected i just simply plugged the nipple back in with no change after that

[ZMANN]

can u hear the vacuum pump run for a second while it sucks down the reservoir ? ( highly technical term I used there ) when key on but not start the truck

that line was for your auto hubs but will only cause a loss of vacuum for less than a minute when selecting 4x4

[6icko driver]

That would explain alot on the 4x4 thanks and i dont think i can all im hearing is glo plugs

[spettit379]

If the vacuum pump is working and there are no leaks you may want to cycle the transfer case switch. Mine had that problem before and doing that cleared it up.

[6icko driver]

Any direction on how to do that?

[spettit379]

Does your truck have 4 wheel drive? If not, then you won't have the tranfer case switch. In which case ignore my previous post. If you have 4 wheel drive then it's the switch on the dash that puts the truck in 4 wheel drive. Just switch it to 4 Hi for a few seconds then back to 2 wheel drive.

[6icko driver]

It does have 4wd so i need to get it put it in 4wd then back to 2wd ? Ok ill try and let u no